<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Apache Tomcat WebSocket Examples: Chat</title>
    <style type="text/css">
        input#chat {
        width: 410px
    }

    #console-container {
        width: 400px;
    }

    #console {
        border: 1px solid #CCCCCC;
        border-right-color: #999999;
        border-bottom-color: #999999;
        height: 170px;
        overflow-y: scroll;
        padding: 5px;
        width: 100%;
    }

    #console p {
        padding: 0;
        margin: 0;
    }
    </style>
</head>
<body>
<div class="noscript"><h2 style="color: #ff0000">Seems your browser doesn't support Javascript! Websockets rely on Javascript being enabled. Please enable
    Javascript and reload this page!</h2></div>
<div>
    <p>
        <input type="text" placeholder="type and press enter to chat" id="chat" />
    </p>
    <div id="console-container">
        <div id="console"/>
    </div>
</div>
<script type="application/javascript">
"use strict";

var Chat = {};

Chat.socket = null;

Chat.connect = (function(host) {
    if ('WebSocket' in window) {
        Chat.socket = new WebSocket(host);
    } else if ('MozWebSocket' in window) {
        Chat.socket = new MozWebSocket(host);
    } else {
        Console.log('Error: WebSocket is not supported by this browser.');
        return;
    }

    Chat.socket.onopen = function () {
        Console.log('Info: WebSocket connection opened.');
        document.getElementById('chat').onkeydown = function(event) {
            if (event.keyCode == 13) {
                Chat.sendMessage();
            }
        };
    };

    Chat.socket.onclose = function () {
        document.getElementById('chat').onkeydown = null;
        Console.log('Info: WebSocket closed.');
    };

    Chat.socket.onmessage = function (message) {
        Console.log(message.data);
    };
});

Chat.initialize = function() {
    if (window.location.protocol == 'http:') {
        Chat.connect('ws://' + window.location.host + '/websocket/chat');
    } else {
        Chat.connect('wss://' + window.location.host + '/websocket/chat');
    }
};

Chat.sendMessage = (function() {
    var message = document.getElementById('chat').value;
    if (message != '') {
        Chat.socket.send(message);
        document.getElementById('chat').value = '';
    }
});

var Console = {};

Console.log = (function(message) {
    var console = document.getElementById('console');
    var p = document.createElement('p');
    p.style.wordWrap = 'break-word';
    p.innerHTML = message;
    console.appendChild(p);
    while (console.childNodes.length > 25) {
        console.removeChild(console.firstChild);
    }
    console.scrollTop = console.scrollHeight;
});

Chat.initialize();


document.addEventListener("DOMContentLoaded", function() {
    // Remove elements with "noscript" class - <noscript> is not allowed in XHTML
    var noscripts = document.getElementsByClassName("noscript");
    for (var i = 0; i < noscripts.length; i++) {
        noscripts[i].parentNode.removeChild(noscripts[i]);
    }
}, false);
</script>

</body>
</html>